This sad clip with over 12 million views shows a teenage toll road employee forcing herself to smile through tears moments after having been berated by an impatient driver.

Shengji Toll Station intern Weng Xin, 19, was working the night shift on the Xiamen-Chengdu Expressway when she was given the undesirable task of sorting out a broken-down vehicle on 25th January.

A driver passing the toll road in Bijie City in China’s south-western Guizhou Province had asked her for help, and Weng arranged for her coworkers to push the motorist’s vehicle away.

Picture Credits: AsiaWire

However, some motorists were not pleased with the delay, and one of them brought the teenager to tears with his apparently rude complaints.

Footage from Weng’s toll booth shows her failing to hold back her tears, wiping them away in the seconds between receiving another driver.

She remains completely professional despite the allegedly insults, and forces herself to smile, leading the CCTV footage to go viral.

Weng said: “After we dealt with the broken-down car, all the people who had been waiting in the queue drove up to me and started complaining.

“I tried my best to explain to them, and some were very understanding of the situation, but there were also a few who weren’t happy.

“When that driver arrived, he immediately started berating me. After I handed him his receipt and he began to leave, he turned around and shouted at me some more.

“I just broke down at that moment. I really wanted to hold back my tears, but I couldn’t. They just came streaming down.”

Social media users have heaped praise on the young woman for her professionalism, as has her boss, Xue Mei.

Xue revealed the young intern has only been with them since December, and that she is still a student at Guizhou Railway Technician College.

It will be up to Xue and also Weng herself whether she remains a civil servant once she leaves college this summer.

Xue said: “But I believe no matter where Weng Xin decides to work, her professional attitude and dedication will be welcome.”

Weng said of her newfound fame: “I didn’t expect the video to go viral online. It’s like everything has changed. But at the end of the day, I’m just a regular toll roll employee. I’m not an internet celebrity.”